名词
中文翻译：私人讲师
同义词：
['private tutor', 'private instructor']
例句：
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1.He is a privatdocent who teaches English in his spare time.
他是一个业余的英语私人讲师。
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2. The privatdocent has been helping the students with their studies for several years.
这位私人讲师已经帮助学生学习了好几年。
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3. She hired a privatdocent to tutor her son in mathematics.
她雇佣了一个私人讲师来辅导她儿子的数学。